程序代码：

bool MemoryHack::Hook(void* addr, const void* jumpTo, size_t len, bool JMPt_or_CALLf)
{
    #pragma pack(push, 1)
            struct
            {
                uint8_t opcode;
                uint32_t offset;
            } *ins = static_cast<decltype(ins)>(addr);
    #pragma pack(pop)
}

程序代码：

    #pragma pack(push, 1)
            struct foo
            {
                uint8_t opcode;
                uint32_t offset;
            };
            foo* ins = (foo*)addr;
    #pragma pack(pop)